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Exports made a solid one percentage point contribution to growth, while household consumption provided more modest support of 0.4 percentage points.

This helped to offset weak business investment.

Treasurer Scott Morrison conceded there is fragility in the March quarter national accounts numbers, which is why the government's economic plan is designed to address investment.

He said Australia also faces strong global headwinds.

"The fact we have achieved these results as an economy ... they happen through the investment and hard work of Australians around the country," the treasurer said in his joint media conference with the prime minister.

He said the transition in the economy from mining investment to broader-based growth is working, "but it cannot be taken for granted".

Shadow treasurer Chris Bowen said without the strong input from exports, the quarterly growth figure would have been flat.

"Beneath the headline figures, we know there is an economy struggling with falling demand and falling income growth," Mr Bowen told reporters in Sydney.

Wednesday's figures are more upbeat than Treasury and the Reserve Bank forecasts would suggest - both predicting growth of 2.5 per cent for this financial year that ends on June 30.

Commonwealth Bank of Australia economist Gareth Aird said Australia finds itself with a unique set of circumstances that will continue to perplex policymakers and complicate the interest rate outlook.

Economic growth is strong and the unemployment rate has been declining, but wages growth is at its lowest level since the 1990s recession and inflation has been falling.

"On the surface, these four outcomes occurring simultaneously is bizarre," Mr Aird said.

However, that doesn't rule out another interest rate cut by the Reserve Bank given its concerns about low inflation, coupled with incredibly weak wages pressures, he said.